Bathtub



FIG. 1 is a top plan view of a bathtub showing our new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a right perspective view thereof;

FIG. 4 is a left perspective view thereof; and,

FIG. 5 is a rear perspective view thereof.

The broken line showing the remainder of the bathtub is for illustrativepurposes only and forms no part of the claimed design.

The ornamental design for a bathtub, as shown and described.